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SCIP Doxygen Documentation: LP Row

public methods for LP rows

returns the scalar product of the coefficient vectors of the two given rows

Note: the scalar product is computed w.r.t. the current LP columns only

Parameters: row1 first LP row row2 second LP row

Definition at line 7006 of file lp.c.

References SCIP_Row::cols, SCIP_Row::cols_index, FALSE, SCIP_Col::index, SCIP_Row::len, SCIP_Row::lpcolssorted, SCIP_Col::lppos, MAX, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, NULL, SCIP_Row::nunlinked, SCIP_Bool, SCIP_Real, SCIProwSort(), SCIPswapPointers(), TRUE, and SCIP_Row::vals.

Referenced by SCIProwGetParallelism().

◆ SCIProwGetParallelism()

returns the degree of parallelism between the hyperplanes defined by the two row vectors v, w: p = |v*w|/(|v|*|w|); the hyperplanes are parallel, iff p = 1, they are orthogonal, iff p = 0

Parameters: row1 first LP row row2 second LP row orthofunc function used for calc. scalar prod. ('e'uclidean, 'd'iscrete)

Definition at line 7722 of file lp.c.

References SCIP_Row::cols, SCIP_Row::len, SCIP_Col::lppos, REALABS, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetDiscreteScalarProduct(), SCIProwGetNNonz(), SCIProwGetNorm(), SCIProwGetScalarProduct(), SQR, SCIP_Row::sqrnorm, and SCIP_Row::vals.

Referenced by aggregation(), computeProjectionScore(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), filterWithDynamicParallelism(), filterWithParallelism(), penaliseWithParallelism(), and SCIProwGetOrthogonality().

◆ SCIProwGetOrthogonality()

returns the degree of orthogonality between the hyperplanes defined by the two row vectors v, w: o = 1 - |v*w|/(|v|*|w|); the hyperplanes are orthogonal, iff p = 1, they are parallel, iff p = 0

Parameters: row1 first LP row row2 second LP row orthofunc function used for calc. scalar prod. ('e'uclidean, 'd'iscrete)

Definition at line 7786 of file lp.c.

References SCIProwGetParallelism().

◆ SCIProwSort() ◆ SCIProwGetNNonz()

get number of nonzero entries in row vector

Parameters

Definition at line 17246 of file lp.c.

References SCIP_Row::len, and NULL.

Referenced by addAltLPRow(), addCut(), addCuts(), addOrigRow(), aggregateGeneratedCuts(), applyRepair(), buildMod2Matrix(), computeRltCut(), constructCutRow(), copyCuts(), createLPWithHardCuts(), createProjRow(), createRows(), detectHiddenProducts(), detectProductsUnconditional(), evaluateCutNumerics(), fillRelationTables(), filterWithDensity(), generateAverageNBRay(), generateDisjCutSOS1(), isAcceptableRow(), mod2MatrixAddOrigRow(), mod2MatrixTransformContRows(), rowCalculateGauss(), rowFindSlackVar(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_HEUREXEC(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPaddRow(), SCIPaddVarsToRow(), SCIPaddVarsToRowSameCoef(), SCIPapplyLockFixings(), SCIPcutpoolSeparate(), SCIPnlrowCreateFromRow(), SCIProwGetParallelism(), SCIPselectCutsEnsemble(), SCIPsepastoreAddCut(), SCIPsepastoreApplyCuts(), SCIPsepastoreIsCutApplicable(), scoring(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), storeSuitableRows(), and updateObjectiveVector().

◆ SCIProwGetNLPNonz() int SCIProwGetNLPNonz ( SCIP_ROW * row )

get number of nonzero entries in row vector, that correspond to columns currently in the SCIP_LP;

Warning: This method is only applicable on rows, that are completely linked to their columns (e.g. a row that is in the current LP and the LP was solved, or a row that was in a solved LP and didn't change afterwards

Parameters

Definition at line 17260 of file lp.c.

References SCIP_Row::nlpcols, NULL, and SCIP_Row::nunlinked.

Referenced by addFlowrowToCommodity(), addRowToCut(), cleanupNetwork(), collectIncidentFlowCols(), computeCut(), createCGMIPprimalsols(), createLPWithHardCuts(), createSubscip(), deleteCommodity(), extractCapacities(), extractCapacityRows(), extractFlowRows(), extractNodes(), findUncapacitatedArcs(), generateClusterCuts(), getFlowrowFit(), getGMIFromRow(), getNodeSimilarityScore(), getRowFracActivity(), identifySourcesTargets(), initMatrix(), mcfnetworkFill(), mod2MatrixTransformContRows(), nodepairqueueCreate(), selectRounding(), selectShifting(), separateCuts(), and storeCuts().

◆ SCIProwGetCols()

gets array with columns of nonzero entries

Parameters

Definition at line 17271 of file lp.c.

References SCIP_Row::cols, and NULL.

Referenced by addAltLPRow(), addFlowrowToCommodity(), addOrigRow(), addRowToCut(), aggregateGeneratedCuts(), applyRepair(), cleanupNetwork(), collectIncidentFlowCols(), computeCut(), computeRltCut(), copyCuts(), createCGMIPprimalsols(), createLPWithHardCuts(), createProjRow(), createRows(), deleteCommodity(), detectHiddenProducts(), detectProductsUnconditional(), extractCapacities(), extractCapacityRows(), extractFlowRows(), extractNodes(), fillRelationTables(), findUncapacitatedArcs(), generateAverageNBRay(), generateClusterCuts(), generateDisjCutSOS1(), getFlowrowFit(), getGMIFromRow(), getNodeSimilarityScore(), getRowFracActivity(), identifySourcesTargets(), initMatrix(), isAcceptableRow(), mcfnetworkFill(), mod2MatrixAddOrigRow(), mod2MatrixTransformContRows(), nodepairqueueCreate(), rowCalculateGauss(), rowFindSlackVar(), SCIP_DECL_HEUREXEC(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPapplyLockFixings(), SCIPnlrowCreateFromRow(), scoring(), selectRounding(), selectShifting(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), storeCuts(), storeSuitableRows(), and updateObjectiveVector().

◆ SCIProwGetVals()

gets array with coefficients of nonzero entries

Parameters

Definition at line 17281 of file lp.c.

References NULL, and SCIP_Row::vals.

Referenced by addAltLPRow(), addFlowrowToCommodity(), addOrigRow(), addRowToCut(), aggregateGeneratedCuts(), applyRepair(), computeCut(), computeRltCut(), copyCuts(), createCGMIPprimalsols(), createLPWithHardCuts(), createProjRow(), createRows(), detectHiddenProducts(), detectProductsUnconditional(), extractCapacityRows(), extractFlowRows(), extractNodes(), generateAverageNBRay(), generateClusterCuts(), generateDisjCutSOS1(), getFlowrowFit(), getGMIFromRow(), getNodeSimilarityScore(), getRowFracActivity(), initMatrix(), mcfnetworkFill(), mod2MatrixAddOrigRow(), mod2MatrixTransformContRows(), rowCalculateGauss(), rowFindSlackVar(), SCIP_DECL_HEUREXEC(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPapplyLockFixings(), SCIPnlrowCreateFromRow(), scoring(), selectRounding(), selectShifting(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), storeCuts(), and updateObjectiveVector().

◆ SCIProwGetConstant()

gets constant shift of row

Parameters

Definition at line 17291 of file lp.c.

References SCIP_Row::constant, and NULL.

Referenced by addAltLPRow(), addFlowrowToCommodity(), addOrigRow(), addRowToCut(), addSideRemoval(), aggregateGeneratedCuts(), applyRepair(), buildMod2Matrix(), computeCut(), computeRltCut(), copyCuts(), createLPWithHardCuts(), createProjRow(), createRows(), createSubscip(), detectHiddenProducts(), detectProductsUnconditional(), extractCapacityRows(), extractFlowRows(), generateClusterCuts(), generateDisjCutSOS1(), getGMIFromRow(), initMatrix(), mod2MatrixTransformContRows(), nodepairqueueCreate(), rowCalculateGauss(), SCIP_DECL_HEUREXEC(), SCIPaddNlpiProblemRows(), SCIPnlrowCreateFromRow(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), storeCuts(), updateLagrangianValue(), and updateSubgradient().

◆ SCIProwGetNorm()

gets Euclidean norm of row vector

Parameters

Definition at line 17301 of file lp.c.

References checkRowSqrnorm, NULL, and SCIP_Row::sqrnorm.

Referenced by addCut(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), getNActiveConsScore(), SCIP_DECL_SEPAEXECLP(), SCIProwGetLPEfficacy(), SCIProwGetNLPEfficacy(), SCIProwGetParallelism(), SCIProwGetRelaxEfficacy(), SCIProwGetSolEfficacy(), scoring(), and separateCuts().

◆ SCIProwGetSumNorm() ◆ SCIProwGetLhs()

returns the left hand side of the row

Parameters

Definition at line 17325 of file lp.c.

References SCIP_Row::lhs, and NULL.

Referenced by addAltLPRow(), addCut(), addFlowrowToCommodity(), addOneRow(), addOrigRow(), addRowToCut(), addSideRemoval(), aggregateGeneratedCuts(), aggregateNextRow(), aggregation(), applyRepair(), buildMod2Matrix(), calcShiftVal(), computeCut(), computeNogoodCut(), computeRltCut(), computeStandardIntegerOptCut(), computeStandardLPFeasibilityCut(), computeStandardLPOptimalityCut(), constructCutRow(), copyCuts(), createCGMIPprimalsols(), createLPWithHardCuts(), createProjRow(), createRows(), createSubscip(), detectHiddenProducts(), detectProductsUnconditional(), determineBound(), extractCapacityRows(), extractFlowRows(), generateAndApplyBendersIntegerCuts(), generateClusterCuts(), generateDisjCutSOS1(), getGMIFromRow(), getNActiveConsScore(), getSimplexCoefficients(), handleNewVariableSOS2(), initMatrix(), initsepaBoundInequalityFromCardinality(), invertCommodity(), mod2MatrixTransformContRows(), nodepairqueueCreate(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_HEUREXEC(), SCIP_DECL_NLHDLRINITSEPA(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPapplyLockFixings(), SCIPgenerateAndApplyBendersOptCut(), SCIPlpGetDualDegeneracy(), SCIPlpRemoveRedundantRows(), SCIPnlrowCreateFromRow(), SCIProwCalcProbability(), SCIPrunBoundHeuristic(), SCIPsepastoreAddCut(), SCIPsolAdjustImplicitSolVals(), scoring(), selectShifting(), separateCuts(), separateRltCuts(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), sepastoreIsCutRedundant(), sepastoreIsCutRedundantOrInfeasible(), setupAggregationData(), shiftValues(), storeCuts(), storeSuitableRows(), updateLagrangianValue(), updateObjectiveVector(), updateSlacks(), updateSubgradient(), and updateViolations().

◆ SCIProwGetRhs()

returns the right hand side of the row

Parameters

Definition at line 17335 of file lp.c.

References NULL, and SCIP_Row::rhs.

Referenced by addAltLPRow(), addCut(), addCuts(), addFlowrowToCommodity(), addOneRow(), addOrigRow(), addRowToCut(), addSideRemoval(), aggregateGeneratedCuts(), aggregateNextRow(), aggregation(), applyRepair(), buildMod2Matrix(), calcShiftVal(), computeCut(), computeRltCut(), computeStandardLPFeasibilityCut(), computeStandardLPOptimalityCut(), constructCutRow(), copyCuts(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createCGMIPprimalsols(), createLPWithHardCuts(), createProjRow(), createRows(), createSubscip(), detectHiddenProducts(), detectProductsUnconditional(), determineBound(), evaluateCutNumerics(), extractCapacityRows(), extractFlowRows(), generateClusterCuts(), generateDisjCutSOS1(), generateOddCycleCut(), getGMIFromRow(), getNActiveConsScore(), getSimplexCoefficients(), handleNewVariableSOS2(), initMatrix(), initsepaBoundInequalityFromCardinality(), invertCommodity(), mod2MatrixTransformContRows(), nodepairqueueCreate(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_HEUREXEC(), SCIP_DECL_NLHDLRINITSEPA(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPapplyLockFixings(), SCIPlpGetDualDegeneracy(), SCIPlpRemoveRedundantRows(), SCIPnlrowCreateFromRow(), SCIProwCalcProbability(), SCIPrunBoundHeuristic(), SCIPsepastoreAddCut(), SCIPsolAdjustImplicitSolVals(), scoring(), selectShifting(), separateCuts(), separateRltCuts(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), sepastoreIsCutRedundant(), sepastoreIsCutRedundantOrInfeasible(), setupAggregationData(), shiftValues(), storeCuts(), storeSuitableRows(), updateLagrangianValue(), updateObjectiveVector(), updateSlacks(), updateSubgradient(), and updateViolations().

◆ SCIProwGetDualsol()

gets the dual LP solution of a row

Parameters

Definition at line 17345 of file lp.c.

References SCIP_Row::dualsol, SCIP_Row::lppos, and NULL.

Referenced by addFlowrowToCommodity(), computeStandardLPOptimalityCut(), createGenVBound(), createRows(), extractCapacityRows(), extractFlowRows(), generateAverageNBRay(), generateAverageRay(), generateClusterCuts(), getDualBranchscore(), getNActiveConsScore(), nodepairqueueCreate(), SCIP_DECL_BRANCHEXECLP(), SCIPgetDualsolKnapsack(), SCIPgetDualsolLinear(), SCIPgetDualsolLogicor(), SCIPgetDualsolSetppc(), SCIPgetDualsolVarbound(), SCIPlpGetDualDegeneracy(), separateCons(), separateCuts(), and solveBilinearLP().

◆ SCIProwGetDualfarkas() ◆ SCIProwGetBasisStatus()

gets the basis status of a row in the LP solution; only valid for LPs with status SCIP_LPSOLSTAT_OPTIMAL and with SCIPisLPSolBasic(scip) == TRUE; returns SCIP_BASESTAT_BASIC for rows not in the current SCIP_LP

Parameters

Definition at line 17373 of file lp.c.

References SCIP_Row::basisstatus, SCIP_Row::lppos, NULL, and SCIP_BASESTAT_BASIC.

Referenced by addOneRow(), addRows(), addRowToCut(), computeIntercut(), computeNegCutcoefs(), computeStrengthenedIntercut(), createAndStoreSparseRays(), createCGMIPprimalsols(), generateDisjCutSOS1(), getGMIFromRow(), getSimplexCoefficients(), SCIP_DECL_SEPAEXECLP(), SCIPlpGetDualDegeneracy(), and storeDenseTableauRow().

◆ SCIProwGetName() const char * SCIProwGetName ( SCIP_ROW * row )

returns the name of the row

Parameters

Definition at line 17384 of file lp.c.

References SCIP_Row::name, and NULL.

Referenced by addFlowrowToCommodity(), addRowToAggrRow(), aggregateGeneratedCuts(), aggregation(), applyRepair(), calcBranchScore(), calcShiftVal(), checkDualFeasibility(), computeCut(), computeProjectionScore(), computeRltCut(), constructCutRow(), copyCuts(), createProjRow(), createRows(), createSubscip(), deleteCommodity(), determineBound(), extractCapacities(), extractCapacityRows(), extractFlow(), extractFlowRows(), extractNodes(), fillRelationTables(), findUncapacitatedArcs(), generateClusterCuts(), getDualBranchscore(), getFlowrowFit(), getNodeSimilarityScore(), nodepairqueueCreate(), relaxVar(), rowCalculateGauss(), rowFindSlackVar(), SCIP_DECL_HEUREXEC(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPaddRowIndicator(), SCIPapplyLockFixings(), SCIPcutpoolAddNewRow(), SCIPcutpoolDelRow(), SCIPcutpoolSeparate(), SCIPlpGetDualfarkas(), SCIPlpRemoveRedundantRows(), SCIPnlrowCreateFromRow(), SCIProwCalcIntegralScalar(), SCIProwCalcProbability(), SCIPrunBoundHeuristic(), SCIPselectCutsDynamic(), SCIPsepastoreAddCut(), SCIPsepastoreApplyCuts(), separateCuts(), separateRltCuts(), sepastoreIsCutRedundant(), and sepastoreIsCutRedundantOrInfeasible().

◆ SCIProwGetIndex() ◆ SCIProwGetAge() ◆ SCIProwGetRank()

gets rank of row

Parameters

Definition at line 17414 of file lp.c.

References NULL, and SCIP_Row::rank.

Referenced by addCut(), addOrigRow(), aggregateGeneratedCuts(), computeCut(), createCGCutCMIR(), createCGCutStrongCG(), evaluateCutNumerics(), getVarRank(), mod2MatrixTransformContRows(), and SCIPapplyLockFixings().

◆ SCIProwIsIntegral() ◆ SCIProwIsLocal()

returns TRUE iff row is only valid locally

Parameters

Definition at line 17434 of file lp.c.

References SCIP_Row::local, and NULL.

Referenced by addAltLPRow(), addCuts(), addFracCounter(), addOneRow(), addOrigRow(), aggregateGeneratedCuts(), buildMod2Matrix(), calcShiftVal(), computeCut(), copyCuts(), createCGCutCMIR(), createCGCutStrongCG(), createRows(), createSubscip(), determineBound(), doSeparation(), mod2MatrixTransformContRows(), SCIP_DECL_HEUREXEC(), SCIPaddRowIndicator(), SCIPcutpoolAddNewRow(), SCIPrunBoundHeuristic(), SCIPsepastoreAddCut(), SCIPsolAdjustImplicitSolVals(), scoring(), separateCuts(), separateRltCuts(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), setupAggregationData(), shiftValues(), storeSuitableRows(), transformColumn(), updateActivities(), and updateRowActivities().

◆ SCIProwIsModifiable()

returns TRUE iff row is modifiable during node processing (subject to column generation)

Parameters

Definition at line 17444 of file lp.c.

References SCIP_Row::modifiable, and NULL.

Referenced by addOneRow(), aggregateGeneratedCuts(), applyFixings(), buildMod2Matrix(), computeCut(), computeRelIntPoint(), constructCutRow(), copyCuts(), createCGCutCMIR(), createCGCutStrongCG(), createCGMIPprimalsols(), createSubscip(), extractCapacityRows(), extractFlowRows(), generateGMICuts(), getGMIFromRow(), mod2MatrixTransformContRows(), SCIP_DECL_SEPAEXECLP(), SCIPcutpoolAddNewRow(), SCIPcutpoolSeparate(), SCIPsepastoreAddCut(), SCIPsepastoreApplyCuts(), SCIPsepastoreIsCutApplicable(), separateCuts(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), sepastoreIsCutRedundant(), sepastoreIsCutRedundantOrInfeasible(), setupAggregationData(), and transformColumn().

◆ SCIProwIsRemovable() ◆ SCIProwGetOrigintype() ◆ SCIProwGetOriginConshdlr() ◆ SCIProwGetOriginCons() ◆ SCIProwGetOriginSepa() ◆ SCIProwIsInGlobalCutpool() ◆ SCIProwGetLPPos()

gets position of row in current LP, or -1 if it is not in LP

Parameters

Definition at line 17534 of file lp.c.

References SCIP_Row::lpdepth, SCIP_Row::lppos, and NULL.

Referenced by addFlowrowToCommodity(), addFracCounter(), addRowToCut(), addSideRemoval(), aggregateNextRow(), calcShiftVal(), calculateBounds(), cleanupNetwork(), createAndStoreSparseRays(), createSubscip(), deleteCommodity(), determineBound(), extractCapacityRows(), extractFlowRows(), extractNodes(), generateClusterCuts(), getFlowrowFit(), getGMIFromRow(), getIncidentNodes(), getNextFlowrow(), getNodeSimilarityScore(), identifySourcesTargets(), initMatrix(), invertCommodity(), mcfnetworkFill(), mod2MatrixAddOrigRow(), relaxVar(), SCIP_DECL_HEUREXEC(), SCIPaggrRowAddRow(), SCIPaggrRowHasRowBeenAdded(), SCIPapplyLockFixings(), SCIPrunBoundHeuristic(), separateCuts(), setupAggregationData(), shiftValues(), storeCuts(), transformColumn(), tryFixVar(), updateActivities(), updateRowActivities(), updateSlacks(), and updateViolations().

◆ SCIProwGetLPDepth() int SCIProwGetLPDepth ( SCIP_ROW * row ) ◆ SCIProwIsInLP()

returns TRUE iff row is member of current LP

Parameters

Definition at line 17556 of file lp.c.

References SCIP_Row::lpdepth, SCIP_Row::lppos, and NULL.

Referenced by addBoundCutSepa(), addCut(), addCuts(), addObjCutoff(), addRelaxation(), allRowsInLP(), applyFixings(), applyObbt(), applyObbtBilinear(), calcShiftVal(), checkCons(), createRow(), generateDisjCutSOS1(), initsepaBoundInequalityFromCardinality(), initsepaBoundInequalityFromSOS1Cons(), SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSINITLP(), SCIP_DECL_CONSSEPALP(), SCIP_DECL_CONSSEPASOL(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_SEPAEXECLP(), SCIPcutpoolSeparate(), SCIPlpGetDualDegeneracy(), SCIPsolAdjustImplicitSolVals(), SCIPupgradeConsLinear(), sepaImplBoundCutsSOS1(), separateCons(), separateConsBinaryRepresentation(), separateCoverCutsCons(), separateCuts(), sepastoreApplyCut(), takeCut(), and updateActivities().

◆ SCIProwGetActiveLPCount() ◆ SCIProwGetNLPsAfterCreation() ◆ SCIProwChgRank() void SCIProwChgRank ( SCIP_ROW * row, int rank )

changes the rank of LP row

Parameters: row LP row rank new value for rank

Definition at line 17567 of file lp.c.

References NULL, and SCIP_Row::rank.

Referenced by addCut(), aggregateGeneratedCuts(), constructCutRow(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), generateOddCycleCut(), generateZerohalfCut(), newsolCliqueAddRow(), and SCIP_DECL_SEPAEXECLP().

◆ SCIPcreateRowConshdlr() SCIP_RETCODE SCIPcreateRowConshdlr ( SCIP * scip, SCIP_ROW ** row, SCIP_CONSHDLR * conshdlr, const char * name, int len, SCIP_COL ** cols, SCIP_Real * vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable )

creates and captures an LP row from a constraint handler

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row pointer to row conshdlr constraint handler that creates the row name name of row len number of nonzeros in the row cols array with columns of row entries vals array with coefficients of row entries lhs left hand side of row rhs right hand side of row local is row only valid locally? modifiable is row modifiable during node processing (subject to column generation)? removable should the row be removed from the LP due to aging or cleanup?

Definition at line 1225 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_CONSHDLR, SCIPcheckStage(), SCIProwCreate(), and TRUE.

◆ SCIPcreateRowCons() SCIP_RETCODE SCIPcreateRowCons ( SCIP * scip, SCIP_ROW ** row, SCIP_CONS * cons, const char * name, int len, SCIP_COL ** cols, SCIP_Real * vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable )

creates and captures an LP row from a constraint

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row pointer to row cons constraint that creates the row name name of row len number of nonzeros in the row cols array with columns of row entries vals array with coefficients of row entries lhs left hand side of row rhs right hand side of row local is row only valid locally? modifiable is row modifiable during node processing (subject to column generation)? removable should the row be removed from the LP due to aging or cleanup?

Definition at line 1259 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_CONS, SCIPcheckStage(), SCIProwCreate(), and TRUE.

◆ SCIPcreateRowSepa() SCIP_RETCODE SCIPcreateRowSepa ( SCIP * scip, SCIP_ROW ** row, SCIP_SEPA * sepa, const char * name, int len, SCIP_COL ** cols, SCIP_Real * vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable )

creates and captures an LP row from a separator

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row pointer to row sepa separator that creates the row name name of row len number of nonzeros in the row cols array with columns of row entries vals array with coefficients of row entries lhs left hand side of row rhs right hand side of row local is row only valid locally? modifiable is row modifiable during node processing (subject to column generation)? removable should the row be removed from the LP due to aging or cleanup?

Definition at line 1293 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_SEPA, SCIPcheckStage(), SCIProwCreate(), and TRUE.

◆ SCIPcreateRowUnspec() SCIP_RETCODE SCIPcreateRowUnspec ( SCIP * scip, SCIP_ROW ** row, const char * name, int len, SCIP_COL ** cols, SCIP_Real * vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable )

creates and captures an LP row from an unspecified source

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row pointer to row name name of row len number of nonzeros in the row cols array with columns of row entries vals array with coefficients of row entries lhs left hand side of row rhs right hand side of row local is row only valid locally? modifiable is row modifiable during node processing (subject to column generation)? removable should the row be removed from the LP due to aging or cleanup?

Definition at line 1327 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_UNSPEC, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by SCIPcreateRow().

◆ SCIPcreateRow() SCIP_RETCODE SCIPcreateRow ( SCIP * scip, SCIP_ROW ** row, const char * name, int len, SCIP_COL ** cols, SCIP_Real * vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable ) ◆ SCIPcreateEmptyRowConshdlr()

creates and captures an LP row without any coefficients from a constraint handler

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row pointer to row conshdlr constraint handler that creates the row name name of row lhs left hand side of row rhs right hand side of row local is row only valid locally? modifiable is row modifiable during node processing (subject to column generation)? removable should the row be removed from the LP due to aging or cleanup?

Definition at line 1391 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_CONSHDLR, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by addCut(), createAndAddTransferredCut(), createDisaggrRow(), createRow(), extendToCover(), generateAndApplyBendersIntegerCuts(), generateAndApplyBendersNogoodCut(), generateBoundInequalityFromSOS1Nodes(), LOPseparate(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSINITLP(), SCIPgenerateAndApplyBendersOptCut(), SCIPgetRowprepRowConshdlr(), sepaImplBoundCutsSOS1(), separateSCIs(), separateSequLiftedExtendedWeightInequality(), separateSupLiftedMinimalCoverInequality(), and sepaSubtour().

◆ SCIPcreateEmptyRowCons()

creates and captures an LP row without any coefficients from a constraint

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row pointer to row cons constraint that creates the row name name of row lhs left hand side of row rhs right hand side of row local is row only valid locally? modifiable is row modifiable during node processing (subject to column generation)? removable should the row be removed from the LP due to aging or cleanup?

Definition at line 1422 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_CONS, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by addOrbisackCover(), addOrbisackInequality(), addRelaxation(), addSymresackInequality(), createCapacityRestriction(), createCapacityRestrictionIntvars(), createCoverCutsTimepoint(), createRelaxation(), createRow(), createRows(), generateRowCardinality(), generateRowSOS2(), initLP(), SCIP_DECL_CONSINITLP(), SCIPgetRowprepRowCons(), separateCons(), separateCoversOrbisack(), separateIndicators(), separatePerspective(), and separateSequLiftedMinimalCoverInequality().

◆ SCIPcreateEmptyRowSepa()

creates and captures an LP row without any coefficients from a separator

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row pointer to row sepa separator that creates the row name name of row lhs left hand side of row rhs right hand side of row local is row only valid locally? modifiable is row modifiable during node processing (subject to column generation)? removable should the row be removed from the LP due to aging or cleanup?

Definition at line 1453 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_SEPA, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by addCut(), addPathCuts(), addSubtourCuts(), addTourCuts(), aggregateGeneratedCuts(), computeCut(), computeRltCut(), constructCutRow(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createObjRow(), createPartitionCut(), generateCut(), generateDisjCutSOS1(), generateOddCycleCut(), generateZerohalfCut(), newsolCliqueAddRow(), SCIP_DECL_SEPAEXECLP(), SCIPgetRowprepRowSepa(), separateCuts(), separateMcCormickImplicit(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), and separateSupLiftedMinimalCoverInequality().

◆ SCIPcreateEmptyRowUnspec()

creates and captures an LP row without any coefficients from an unspecified source

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row pointer to row name name of row lhs left hand side of row rhs right hand side of row local is row only valid locally? modifiable is row modifiable during node processing (subject to column generation)? removable should the row be removed from the LP due to aging or cleanup?

Definition at line 1482 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_UNSPEC, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by addObjCutoff(), SCIP_DECL_BRANCHEXECLP(), SCIPcreateEmptyRow(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), and solveBilinearLP().

◆ SCIPcreateEmptyRow() ◆ SCIPcaptureRow() ◆ SCIPreleaseRow()

decreases usage counter of LP row, and frees memory if necessary

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row pointer to LP row

Definition at line 1562 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwRelease(), and TRUE.

Referenced by addCut(), addCutPool(), addOrbisackCover(), addOrbisackInequality(), addPathCuts(), addSubtourCuts(), addSymresackInequality(), addTourCuts(), aggregation(), applyObbt(), applyObbtBilinear(), computeCut(), consdataFree(), consdataFreeRows(), createAndAddTransferredCut(), createCapacityRestrictionIntvars(), createCGCutCMIR(), createCGCutDirect(), createCGCuts(), createCGCutStrongCG(), createRow(), doSeparation(), extendToCover(), generateAndApplyBendersIntegerCuts(), generateAndApplyBendersNogoodCut(), generateOddCycleCut(), generateZerohalfCut(), initLP(), initsepaBoundInequalityFromCardinality(), initsepaBoundInequalityFromSOS1Cons(), LOPseparate(), mcfnetworkFree(), newsolCliqueAddRow(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSDELETE(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSEXITSOL(), SCIP_DECL_CONSINITLP(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_NLHDLREXITSEPA(), SCIP_DECL_NLHDLRINITSEPA(), SCIP_DECL_NLHDLRSOLLINEARIZE(), SCIP_DECL_SEPAEXECLP(), SCIP_DECL_SEPAEXITSOL(), SCIPgenerateAndApplyBendersOptCut(), SCIPprocessRowprepNonlinear(), SCIPupgradeConsLinear(), sepaImplBoundCutsSOS1(), separateCons(), separateCoversOrbisack(), separateCuts(), separateDeterminant(), separateIndicators(), separateMcCormickImplicit(), separatePerspective(), separateRltCuts(), separateSCIs(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), sepaSubtour(), solveBilinearLP(), and TCLIQUE_NEWSOL().

◆ SCIPchgRowLhs()

changes left hand side of LP row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row lhs new left hand side

Definition at line 1583 of file scip_lp.c.

References FALSE, SCIP_Row::lppos, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIPlpDiving(), SCIProwChgLhs(), and TRUE.

Referenced by chgLhs(), computeNogoodCut(), computeRltCut(), computeStandardIntegerOptCut(), generateAndApplyBendersIntegerCuts(), generateCut(), handleNewVariableSOS2(), SCIP_DECL_NLHDLRINITSEPA(), and separateMcCormickImplicit().

◆ SCIPchgRowRhs()

changes right hand side of LP row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row rhs new right hand side

Definition at line 1607 of file scip_lp.c.

References FALSE, SCIP_Row::lppos, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIPlpDiving(), SCIProwChgRhs(), and TRUE.

Referenced by chgRhs(), computeCut(), computeRltCut(), generateCut(), generateOddCycleCut(), handleNewVariableSOS2(), SCIP_DECL_NLHDLRINITSEPA(), and separateMcCormickImplicit().

◆ SCIPcacheRowExtensions()

informs row, that all subsequent additions of variables to the row should be cached and not directly applied; after all additions were applied, SCIPflushRowExtensions() must be called; while the caching of row extensions is activated, information methods of the row give invalid results; caching should be used, if a row is build with SCIPaddVarToRow() calls variable by variable to increase the performance

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row

Definition at line 1635 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwDelaySort(), and TRUE.

Referenced by addCut(), addObjCutoff(), addOrbisackCover(), addOrbisackInequality(), addPathCuts(), addSubtourCuts(), addSymresackInequality(), addTourCuts(), aggregateGeneratedCuts(), computeCut(), computeRltCut(), constructCutRow(), createCapacityRestriction(), createCapacityRestrictionIntvars(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createCoverCutsTimepoint(), createObjRow(), createPartitionCut(), createRelaxation(), createRow(), extendToCover(), generateCut(), generateDisjCutSOS1(), generateOddCycleCut(), generateZerohalfCut(), LOPseparate(), newsolCliqueAddRow(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_SEPAEXECLP(), sepaImplBoundCutsSOS1(), separateCons(), separateCoversOrbisack(), separateIndicators(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), and sepaSubtour().

◆ SCIPflushRowExtensions()

flushes all cached row extensions after a call of SCIPcacheRowExtensions() and merges coefficients with equal columns into a single coefficient

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row

Definition at line 1658 of file scip_lp.c.

References FALSE, rowLink(), SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwForceSort(), and TRUE.

◆ SCIPaddVarToRow()

resolves variable to columns and adds them with the coefficient to the row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Attention: If the absolute value of val is below the SCIP epsilon tolerance, the variable will not added.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Note: In case calling this method in the enforcement process of an lp solution, it might be that some variables, that were not yet in the LP (e.g. dynamic columns) will change their lp solution value returned by SCIP. For example, a variable, which has a negative objective value, that has no column in the lp yet, is in the lp solution on its upper bound (variables with status SCIP_VARSTATUS_LOOSE are in an lp solution on it's best bound), but creating the column, changes the solution value (variable than has status SCIP_VARSTATUS_COLUMN, and the initialization sets the lp solution value) to 0.0. (This leads to the conclusion that, if a constraint was violated, the linear relaxation might not be violated anymore.); When several variables are added to a row with the use of this function, performance can be improved by calling SCIPcacheRowExtensions() before these additions and SCIPflushRowExtensions() after.

resolves variable to columns and adds them with the coefficient to the row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Attention: If the absolute value of val is below the SCIP epsilon tolerance, the variable will not added.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Note: In case calling this method in the enforcement process of an lp solution, it might be that some variables, that were not yet in the LP (e.g. dynamic columns) will change their lp solution value returned by SCIP. For example, a variable, which has a negative objective value, that has no column in the lp yet, is in the lp solution on its upper bound (variables with status SCIP_VARSTATUS_LOOSE are in an lp solution on it's best bound), but creating the column, changes the solution value (variable than has status SCIP_VARSTATUS_COLUMN, and the initialization sets the lp solution value) to 0.0. (This leads to the conclusion that, if a constraint was violated, the linear relaxation might not be violated anymore.); If the variable being added is FIXED (as given by the status SCIP_VARSTATUS_FIXED), then the variable is not added to the row, but the corresponding constant is added. Similarly, if the input variable is aggregated (as given by the status SCIP_VARSTATUS_AGGREGATED), then the input variable is substituted with its aggregation. For other cases, and to better understand the function behavior, please check the code of SCIPvarAddToRow.; When several variables are added to a row with the use of this function, performance can be improved by calling SCIPcacheRowExtensions() before these additions and SCIPflushRowExtensions() after.

Parameters: scip SCIP data structure row LP row var problem variable val value of coefficient

Definition at line 1701 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIPvarAddToRow(), and TRUE.

Referenced by addAuxiliaryVariableToCut(), addBilinearTermToCut(), addCoef(), addCut(), addFacetToCut(), addLinearTermToCut(), addObjCutoff(), addOrbisackCover(), addOrbisackInequality(), addPathCuts(), addRelaxation(), addRltTerm(), addSubtourCuts(), addSymresackInequality(), addTourCuts(), aggregateGeneratedCuts(), computeNogoodCut(), computeRltCut(), computeStandardIntegerOptCut(), constructCutRow(), createAndAddTransferredCut(), createCapacityRestriction(), createCapacityRestrictionIntvars(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createCoverCutsTimepoint(), createDisaggrRow(), createObjRow(), createPartitionCut(), createRelaxation(), createRow(), createRows(), delCoefPos(), extendToCover(), generateCut(), generateDisjCutSOS1(), generateOddCycleCut(), generateZerohalfCut(), handleNewVariableCardinality(), handleNewVariableSOS1(), handleNewVariableSOS2(), initLP(), LOPseparate(), newsolCliqueAddRow(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_EVENTEXEC(), SCIP_DECL_SEPAEXECLP(), SCIPgenerateAndApplyBendersOptCut(), sepaImplBoundCutsSOS1(), separateCons(), separateCoversOrbisack(), separateIndicators(), separateMcCormickImplicit(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), sepaSubtour(), and solveBilinearLP().

◆ SCIPaddVarsToRow()

resolves variables to columns and adds them with the coefficients to the row; this method caches the row extensions and flushes them afterwards to gain better performance

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Attention: If a coefficients absolute value is below the SCIP epsilon tolerance, the variable with its value is not added.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row nvars number of variables to add to the row vars problem variables to add vals values of coefficients

Definition at line 1727 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwDelaySort(), SCIProwEnsureSize(), SCIProwForceSort(), SCIProwGetNNonz(), SCIPvarAddToRow(), and TRUE.

Referenced by addCut(), createRow(), generateBoundInequalityFromSOS1Nodes(), generateRowCardinality(), initLP(), SCIPgenerateAndApplyBendersOptCut(), SCIPgetRowprepRowCons(), SCIPgetRowprepRowConshdlr(), SCIPgetRowprepRowSepa(), separatePerspective(), and separateSCIs().

◆ SCIPaddVarsToRowSameCoef()

resolves variables to columns and adds them with the same single coefficient to the row; this method caches the row extensions and flushes them afterwards to gain better performance

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Attention: If the absolute value of val is below the SCIP epsilon tolerance, the variables will not added.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row nvars number of variables to add to the row vars problem variables to add val unique value of all coefficients

Definition at line 1773 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwDelaySort(), SCIProwEnsureSize(), SCIProwForceSort(), SCIProwGetNNonz(), SCIPvarAddToRow(), and TRUE.

Referenced by addRelaxation(), createRelaxation(), createRow(), createRows(), and generateRowSOS2().

◆ SCIPcalcRowIntegralScalar()

tries to find a value, such that all row coefficients, if scaled with this value become integral

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row mindelta minimal relative allowed difference of scaled coefficient s*c and integral i maxdelta maximal relative allowed difference of scaled coefficient s*c and integral i maxdnom maximal denominator allowed in rational numbers maxscale maximal allowed scalar usecontvars should the coefficients of the continuous variables also be made integral? intscalar pointer to store scalar that would make the coefficients integral, or NULL success stores whether returned value is valid

Definition at line 1815 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwCalcIntegralScalar(), and TRUE.

◆ SCIPmakeRowIntegral()

tries to scale row, s.t. all coefficients (of integer variables) become integral

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row mindelta minimal relative allowed difference of scaled coefficient s*c and integral i maxdelta maximal relative allowed difference of scaled coefficient s*c and integral i maxdnom maximal denominator allowed in rational numbers maxscale maximal value to scale row with usecontvars should the coefficients of the continuous variables also be made integral? success stores whether row could be made rational

Definition at line 1844 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwMakeIntegral(), and TRUE.

Referenced by addCut(), addCuts(), createCGCutCMIR(), createCGCutStrongCG(), evaluateCutNumerics(), and generateDisjCutSOS1().

◆ SCIPmarkRowNotRemovableLocal() void SCIPmarkRowNotRemovableLocal ( SCIP * scip, SCIP_ROW * row ) ◆ SCIPgetRowNumIntCols() ◆ SCIPgetRowMinCoef()

returns minimal absolute value of row vector's non-zero coefficients

Returns: minimal absolute value of row vector's non-zero coefficients

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row

Definition at line 1904 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetMinval(), and TRUE.

Referenced by addCut(), computeCut(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_SEPAEXECLP(), and scoring().

◆ SCIPgetRowMaxCoef()

returns maximal absolute value of row vector's non-zero coefficients

Returns: maximal absolute value of row vector's non-zero coefficients

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row

Definition at line 1922 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetMaxval(), and TRUE.

Referenced by addCut(), addPathCuts(), addTourCuts(), computeCut(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), generateClusterCuts(), initMatrix(), nodepairqueueCreate(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_SEPAEXECLP(), and scoring().

◆ SCIPgetRowMinActivity() ◆ SCIPgetRowMaxActivity() ◆ SCIPrecalcRowLPActivity() ◆ SCIPgetRowLPActivity()

returns the activity of a row in the last LP solution

Returns: activity of a row in the last LP solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters: scip SCIP data structure row LP row

Definition at line 1993 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPActivity(), and TRUE.

Referenced by addCut(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createCGMIPprimalsols(), createSubscip(), generateDisjCutSOS1(), getGMIFromRow(), getSimplexCoefficients(), SCIP_DECL_SEPAEXECLP(), and separateCons().

◆ SCIPgetRowLPFeasibility() ◆ SCIPrecalcRowPseudoActivity() ◆ SCIPgetRowPseudoActivity() ◆ SCIPgetRowPseudoFeasibility()

returns the feasibility of a row for the current pseudo solution: negative value means infeasibility

Returns: the feasibility of a row for the current pseudo solution: negative value means infeasibility

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters: scip SCIP data structure row LP row

Definition at line 2064 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetPseudoFeasibility(), and TRUE.

◆ SCIPrecalcRowActivity() ◆ SCIPgetRowActivity()

returns the activity of a row in the last LP or pseudo solution

Returns: the activity of a row in the last LP or pseudo solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters: scip SCIP data structure row LP row

Definition at line 2104 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPActivity(), SCIProwGetPseudoActivity(), SCIPtreeHasCurrentNodeLP(), and TRUE.

Referenced by addRowToCut(), createRows(), generateGMICuts(), getGMIFromRow(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_HEUREXEC(), and SCIP_DECL_SEPAEXECLP().

◆ SCIPgetRowFeasibility()

returns the feasibility of a row in the last LP or pseudo solution

Returns: the feasibility of a row in the last LP or pseudo solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters: scip SCIP data structure row LP row

Definition at line 2124 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPFeasibility(), SCIProwGetPseudoFeasibility(), SCIPtreeHasCurrentNodeLP(), and TRUE.

Referenced by generateClusterCuts(), nodepairqueueCreate(), scoring(), separateMcCormickImplicit(), and separateRltCuts().

◆ SCIPgetRowSolActivity()

returns the activity of a row for the given primal solution

Returns: the activitiy of a row for the given primal solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters: scip SCIP data structure row LP row sol primal CIP solution

Definition at line 2144 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPActivity(), SCIProwGetPseudoActivity(), SCIProwGetSolActivity(), SCIPtreeHasCurrentNodeLP(), and TRUE.

Referenced by addCut(), aggregation(), applyRepair(), buildMod2Matrix(), checkCons(), computeCut(), computeNogoodCut(), computeStandardIntegerOptCut(), getNActiveConsScore(), mod2MatrixTransformContRows(), SCIP_DECL_HEUREXEC(), SCIPcutGenerationHeuristicCMIR(), SCIPgenerateAndApplyBendersOptCut(), SCIPgetActivityLinear(), separateCuts(), and updateSubgradient().

◆ SCIPgetRowSolFeasibility()

returns the feasibility of a row for the given primal solution

Returns: the feasibility of a row for the given primal solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters: scip SCIP data structure row LP row sol primal CIP solution

Definition at line 2167 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPFeasibility(), SCIProwGetPseudoFeasibility(), SCIProwGetSolFeasibility(), SCIPtreeHasCurrentNodeLP(), and TRUE.

Referenced by addCut(), extendToCover(), generateClusterCuts(), SCIP_DECL_NLHDLRENFO(), SCIPgetFeasibilityLinear(), separateCons(), separateConsBinaryRepresentation(), and separateCoverCutsCons().

◆ SCIPgetRowObjParallelism() ◆ SCIPprintRow()

output row to file stream via the message handler system

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

output row to file stream via the message handler system

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters: scip SCIP data structure row LP row file output file (or NULL for standard output)

Definition at line 2212 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwPrint(), and TRUE.

Referenced by addBoundCutSepa(), addCut(), addOrbisackCover(), addOrbisackInequality(), addPathCuts(), addRelaxation(), addSubtourCuts(), addTourCuts(), computeCut(), computeRltCut(), createCapacityRestriction(), createCapacityRestrictionIntvars(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createObjRow(), createPartitionCut(), createRow(), extendToCover(), generateAndApplyBendersIntegerCuts(), generateAndApplyBendersNogoodCut(), generateBoundInequalityFromSOS1Nodes(), generateCut(), generateOddCycleCut(), generateRowCardinality(), generateRowSOS2(), initLP(), initMatrix(), initsepaBoundInequalityFromCardinality(), initsepaBoundInequalityFromSOS1Cons(), LOPseparate(), rowCalculateGauss(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_CONSSEPALP(), SCIP_DECL_CONSSEPASOL(), SCIP_DECL_HEUREXEC(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_NLHDLRINITSEPA(), SCIP_DECL_SEPAEXECLP(), SCIPapplyLockFixings(), SCIPprocessRowprepNonlinear(), SCIProwCalcProbability(), sepaImplBoundCutsSOS1(), separateCons(), separateCoversOrbisack(), separateCuts(), separateIndicators(), separatePerspective(), and separateRltCuts().

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